[Rpm-maint] [rpm-software-management/rpm] Add real-life examples of Python RPM (PR #3177)

[Frank Dana]

@ferdnyc commented on this pull request.



> @@ -0,0 +1,15 @@
+#!/usr/bin/python
+
+# Query a single installed package by its name.
+# A Python equivalent for `rpm -q hello`
+
+import rpm
+
+name = "hello"
+ts = rpm.TransactionSet()
+mi = ts.dbMatch("name", name)
+hdr = next(mi, None)
+if hdr:

(You can also check for an empty list after the loop, e.g. this will print "No results" only when the list is empty):

```python
mi = ts.dbMatch("name", name)
for hdr in mi:
    ...
if not mi:
    print("No results")
```


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